Grinding-mill



2 Sheets- Sheet '1. M. I. ABBE. GRINDING MILL.

(No Model.)

No. 587,688. Patented Aug. 10,1897.

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(No Model.)

Patented Aug.'10,1897

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UNITED STATES PATENT OFFICE.

MAX F. ABBE, OF BROOKLYN, NEW YORK.

GRlNDiNG-MiLL.

SPECIFICATION forming part of Letters Patent No. 587,688, dated August10, 1897.

Application filed April 1'7, 189?. Serial No. 632,631. (No model.)

1'0 all whom, it may concern.-

Be it known that I, MAX F. ABBE, a citizen of the United States, and aresident of Brooklyn, in the county of Kings and State of New York, haveinvented certain new and useful Improvements in Grinding-Mills, of whichthe following is a specification. v

This invention relates to a grinding-mill of improved construction anddesigned for reducing spices, sugar, fertilizers, and other substances.

The mill is of the class described in Patent No. 496,677, granted to R.IV. F. Abbe May 2, 1893, and is constructed with a view of effecting aready inspection and adjustment of the parts, insuring a thoroughreduction of the substances to be ground and providing variousimprovements in the details of construction, all as hereinafter morefully pointed out.

In the accompanying drawings, Figure 1 is a vertical central section ofmy improved grinding-mill on line 1 1, Fig. 2. Fig. 2 is a plan; Fig. 3,a horizontal section on line 3 3, Fig. l, with the shell-section I)removed.

The letter 0. represents the annular baseplate of the mill provided withan inner concentric flange a and a central step-bearing a Upon the ringa there is supported the divided shell of the mill, which is made in twosections 1) I), each of semicircular form. The sections 1) b areattached to the ring a by the vertically-swim ging bolts bflwhile thesections 1) Z) are attached to one another by the horizontally-swingingbolts b To the upper flange of the section b,which I term the fixedsection, there are secured by bolts 0 the outer ends of three (more orless) radial arms 0, which at their center form the bearing 0 of theupright work-shaft d, that projects with its lower end into the step aThe two outer arms 0 form an obtuse angle at the bearing and thenceextend to the ends of the fixed section I), while the inner arm abisects or subdivides the angle formed by the outer arms, Fig. 2. Withinthe step a the shaft (1 is supported by two (more or less) bearings d,which are vertically adjustable by set-screw (P, by means of which theshaft may be vertically raised to regulate the fineness of the powder.The upper end of the shaft (7 is provided within the bearing 0 with acollar or enlargement d turning in a sleeve 0 while the base-plate ofthe bearing a is flanged, as at 0 beneath such collar. In this way thebearing constitutes in effect an oilcup, which will prevent thelubricant from running down the shafting and mixing with the substancesto'be ground. It will be seen that the'shaft d is supported at its upperend solely by the fixed section b of the shell, while the section b,which I term the movable section, does not take any part in supportingthe shaft-bearing. In this way the section I) may be at any time readilyunbolted and removed to open and inspect the mill without disturbing anyof the bearings or driving parts of the machine.

Upon the inner flange a of the base-ring a there is supported a fixedannular grindingplate e, made with two (more or less) concentriccorrugated grinding rings or concaves e 0 while at its center itsurrounds a tubular bearing f, that receives shaft d and projects intothe step a Above the plate e there is secured to shaft cl the hub g of arevoluble receiver 9, into which the material to be ground is fed fromthe hopper or inlet-pipe h, secured to fixed section Z). The receiver 9is composed of an upright flange g placed concentric to shaft cl, ahorizontal body and a downwardlyinclined flange g which terminatesatapoint between the inner and outer concaves ee of the base-plate e.The receiver g is formed with four (more or less) radial arms i, madeintegral therewith and projecting from hub g to a point beyond theflange The arms 1; thus serve to secure the receiver g to the shaft d,and they likewise serve for the attachment of the grinders or beaters 411 which are bolted within slots of the arms. The

beaters t" t are placed within and beyond the duct the powder to theouter grinders and prevent the same from scattering. Upon the edge ofthe plate e there is secured the circular screen j, through which thepowder falls into an annular chamber or hopper A between the parts 6 bb, to be thence conveyed to a suitable storage receptacle or bin. Anumber of stops 70 7t, made in the form of plates or fingers, dependfrom the roof of shells b 1) within the screen j. These stops preventthe air-current from deflecting the powder from its radial direction,and thus insure its forcible ejectment through the screen.

The air drawn into the machine is admitted through an air-inlet pipe Z,secured to fixed section b and controlled by a valve Z.

It will be seen that in my improved grinding-milla full inspection ofthe machine may be readily effected without disturbing any of theoperating parts thereof. The mill feeds, grinds, and screens thesubstances quickly, thoroughly, and uniformly, so that a verysatisfactory and even resultis obtained. The

usual or average speed of operation is abouttwo thousand revolutions perminute.

concaves with a central. shaft, a receiver secured thereto and havingaset of radial arms and heaters secured to said arms, the receiver beingprovided with an inclined flange 9 within the outermost set of beaters,substantially as specified.

2.. In agrinding-mill the combination of a grinding-plate havingconcentric annular concaves, with a shaft, a receiver having uprightflange g and inclined flange g, a set of radial arms 2', projectingbeyond the flange g and two sets of heaters secured to the radial armswithin and beyond the flange g, respectively, substantially as.specified.

Signed at New York, in the county of New York and State of New York,this 13th day of April, A. D. 1897.

MAX F. ABBE.

\Vitnesses:

F. v. BRIESEN, WILLIAM SoHULz.

